If your user is part of the wheel group, then it has sudo access. If you remember the Fedora Installer, it actually gives you the option to mark a new user to be part of the wheel group during installation.

The useradd command adds a new user to the system.As you can well guess, this command has to execute as root, otherwise anyone can add random user accounts in the system. The following command adds a new user babai to the system.